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https://github.com/openvswitch/ovs
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74ff3298c8
Define struct eth_addr and use it instead of a uint8_t array for all ethernet addresses in OVS userspace. The struct is always the right size, and it can be assigned without an explicit memcpy, which makes code more readable. "struct eth_addr" is a good type name for this as many utility functions are already named accordingly. struct eth_addr can be accessed as bytes as well as ovs_be16's, which makes the struct 16-bit aligned. All use seems to be 16-bit aligned, so some algorithms on the ethernet addresses can be made a bit more efficient making use of this fact. As the struct fits into a register (in 64-bit systems) we pass it by value when possible. This patch also changes the few uses of Linux specific ETH_ALEN to OVS's own ETH_ADDR_LEN, and removes the OFP_ETH_ALEN, as it is no longer needed. This work stemmed from a desire to make all struct flow members assignable for unrelated exploration purposes. However, I think this might be a nice code readability improvement by itself. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* Copyright (c) 2012 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License. */
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#ifndef BFD_H
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#define BFD_H 1
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#define BFD_PACKET_LEN 24
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#define BFD_DEST_PORT 3784
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#include <stdbool.h>
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#include <inttypes.h>
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#include "packets.h"
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struct bfd;
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struct dpif_flow_stats;
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struct flow;
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struct flow_wildcards;
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struct netdev;
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struct dp_packet;
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struct smap;
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long long int bfd_wait(const struct bfd *);
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void bfd_run(struct bfd *);
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bool bfd_should_send_packet(const struct bfd *);
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void bfd_put_packet(struct bfd *bfd, struct dp_packet *packet,
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const struct eth_addr eth_src);
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bool bfd_should_process_flow(const struct bfd *, const struct flow *,
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struct flow_wildcards *);
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void bfd_process_packet(struct bfd *, const struct flow *,
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const struct dp_packet *);
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void bfd_init(void);
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struct bfd *bfd_configure(struct bfd *, const char *name,
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const struct smap *smap,
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struct netdev *netdev);
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struct bfd *bfd_ref(const struct bfd *);
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void bfd_unref(struct bfd *);
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void bfd_account_rx(struct bfd *, const struct dpif_flow_stats *);
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bool bfd_forwarding(struct bfd *);
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bool bfd_check_status_change(struct bfd *);
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void bfd_get_status(const struct bfd *, struct smap *);
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void bfd_set_netdev(struct bfd *, const struct netdev *);
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long long int bfd_wake_time(const struct bfd *);
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#endif /* bfd.h */
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